Smart Antenna Advice?

I used my FCC coupon/cards and picked up my two Digital TV Converters last spring... I just hooked one of them up and was fairly impressed by the picture quality in the couple of stations I picked up (and then lost) using an old antenna I got with a TV years back.

(We are unable to get cable or satellite and don't watch much TV... but I want to see what I can get with a Smart Antenna)